Transactions of Materials and Heat Treatment

Title：Geometric shape effect of rectangular case drawing forming

Authors： E Daxin(Beijing Institute of Technology) Takaji Mizuno(Nagoya Institute of Technology)

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KeyWords： Rectangular case drawing Corner radius Geometrical shape effect Deforming resistance

ClassificationCode：TG386

year,vol(issue):pagenumber：2004,29(3):30-33

Abstract：

The geometric shape effect in the process of forming is analyzed and summarized based on a great deal of drawing experiments of rectangular case. It's pointed out that the relative drawing ratio of rectangular case and flange deforming machining degree depend directly on r c/w , the geometric shape parameter, which is closely related to the forming limit too. When r c/w becomes small, the deforming machining degree of flange corner side is increased, and the mitigatory function of deformation of straight side is strengthened. When r c/w becomes big, the geometric shape effect of blank is strengthened and forming limit can be raised by changing blank shape and relative size of long side and short side properly.

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